The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 25, 1997
Filed:
Mar. 23, 1994
Hitachi, Ltd., Tokyo, JP;
Abstract
A planetary gear device includes a sun gear, planet gears to be meshed with the sun gear and an internal gear to be meshed with the planet gears each having a tooth profile formed to an involute curve, wherein tooth surfaces on one side of the planet gears meshing with the sun gear and tooth surfaces on the other side of the planet gears meshing with the internal gear are respectively corrected by different amounts of correction on the basis of deformation amounts of teeth of the planet gears caused by meshes with the sun gear and the internal gear so that rotary motion can be smoothly transmitted when the tooth faces of the planet gears meshed with the sun gear and the tooth faces of the planet gears meshed with the internal gear are elastically deformed by the mesh thereof.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile